* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.wrapper {
    width: 600px;
    height: 210px;
}

ul {
    float: left;
    list-style: none;
    width: 100px;
}

.menu-item {
    width: 100px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    color: #fff;
    background-color: #09f;
    border-bottom: 1px solid #fff;
    cursor: pointer;
}

.r-con {
    float: right;
    width: 500px;
    height: 210px;
    background-color: #aaa;
}

.pic {
    width: 500px;
    height: 210px;
    display: none;
}

.pic ul {
    width: 400px;
    margin-left: 20px;
}

.pic ul li {
    float: left;
    width: 100px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    cursor: pointer;
    color: #fff;
    background-color: aqua;
}

.pic img {
    width: 500px;
    height: 210px;
}

.active {
    display: block;
}

.on {
    background-color: orange;
}